Sweet spot overdrive ratio for crawling?

[psn]

I am building GK (minus the cage) for crawling (not trailing) and wondering what OD ratio you guys like most

the numbers from mtnwheelings post on 11/6/21...

the kit options
26T Idler 54T Drive Gear = +11.83% Overdrive (I got 11.25%)
27T Idler 53T Drive Gear = +5.7% overdrive (I got 5.53%)
28T Idler 54T Drive Gear = 0% (1:1, no overdrive)

some aftermarket options
HR UD2 24T Idler 56T Drive Gear = +22.73%
HR UD3 25T Idler 55T Drive Gear = +16.9%

TIA

[DRED805]

Closer to 40% if you want it to really stay planted.

[psn]

I thought "the more the better" too but after watching this I dont know now...

https://www.youtube.com/watch?v=4KEYGLvyFnM

[utieh]

I'm using the stock 11.8% it's clearly not enough for my taste, neither for helping with the turning nor climbing, I ordered the Team KNK 25% gears which is closer to what I'm at with my other scale crawler truck.

[themountain]

24.45788%. ...that is scientifically proven !

[DRED805]

Originally Posted by psn

I thought "the more the better" too but after watching this I dont know now...

https://www.youtube.com/watch?v=4KEYGLvyFnM

I'd take information from that garbage channel with a grain of salt. To be honest I'm surprised you were able to sit through the video long enough to get that information. Holy ****.

I'm probably full of shit, too. But I've got a trucks with 20%, 30% and one with 37%. I'll take the latter. The truck I'm working on now will be built for climbing (the phoenix kinda sucks at that from what I've seen in person), and has a vfd twin. I'll be able to switch between 17.5% and 44% (11% OD in the axles, it's complicated). Then I'll really be able to test it.



Also, I used KNK 25% overdrive (underdrive) gears when I built a gatekeeper a couple months back. They're sold out on the knk site, but RPP has them.

[ferp420]

Originally Posted by DRED805

I'd take information from that garbage channel with a grain of salt. To be honest I'm surprised you were able to sit through the video long enough to get that information. Holy ****.

that guy is a forum member i dont remeber his screen name off hand but
he is vary active on here

i dont always agree with what he seas but he dose get alot of his information from this site i get the feeling he dosent fully understand what hes talking about but hes not completely out in left feild ether

[DRED805]

Originally Posted by ferp420

that guy is a forum member i dont remeber his screen name off hand but
he is vary active on here

i dont always agree with what he seas but he dose get alot of his information from this site i get the feeling he dosent fully understand what hes talking about but hes not completely out in left feild ether

Well, if he's listening, I've got questions about false information he gave about the Hota D6+ charger in one of the reviews...

[ferp420]

Originally Posted by DRED805

Well, if he's listening, I've got questions about false information he gave about the Hota D6+ charger in one of the reviews...

hes tryin i disagree with alot of what he seas in alot of his videos lol but i havent really herd any really bad information but i dont watch alot of his videos ether

every once and a while he will come up with a good one though

[DrIsotope]

Front overdrive / rear underdrive works some of the time, but an even 1:1 works all of the time. Big overdrive is a nightmare on sidehill. Vanquish really got it right on the VFD Twin, because it's "big" OD that you can turn off. I swapped out the gearbox in my Ecto to trade that small percentage OD for dig, and it's far more capable. The way I look at it is both OD and dig are highly situational in the usefulness, but you'll get a lot more out of dig.

Also, it's perhaps anecdotal, but I've found some tires do better without any OD-- I didn't like Landmines on the Phoenix much at all, but they're great on unmodified TRX-4 axles. By the same token, Tusks are better with OD than without.

So TL;DR, I'd say with a Stealth put it on the 11 point whatever percent and leave it. IME that amount of OD doesn't matter, but the tiny bit of extra front speed will help tighten the turning a little bit, without killing sidehill performance.

Empirical but anecdotal-- that's where I live.

[psn]

Great info Dr!

I watched your video about the trans swap and will be trying one out. Haven't had dig since the Creeper days



Liking this build so far

[The Roaming Basher]

Holy craples a venom crawler. I remember when they first came out wayyyyyyy back in the day. I was building my ax10 with DNA chassis at that time.

[mr lee]

Originally Posted by The Roaming Basher

Holy craples a venom crawler. I remember when they first came out wayyyyyyy back in the day. I was building my ax10 with DNA chassis at that time.

I was thinking the same

Was so looking into those back in the day but opted for and SCX10.